Abrasive wheel which can be provided with a sandpaper

ABSTRACT

An abrasive wheel provided with a piece of sandpaper, including a columnar main body and a tension member. A first surface is formed on the periphery of the main body. The main body forms first and second storage chambers. The first surface forms a channel communicating with the first storage chamber. The second storage chamber extends on one side of the channel, so that one end of a piece of sandpaper enters the first storage chamber to form a restricted part. The other end of the sandpaper is located in the second storage chamber. The tension member is disposed in the first storage chamber, and is provided with a guide slot, so that the restricted part enters the guide slot through the channel, and the restricted part is guided to adhere to the circumferential wall as the tension member rotates, the sandpaper stretches tight and adheres to the first surface.

CROSS-REFERENCE TO RELATED U.S. APPLICATIONS

Not applicable.

STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT

Not applicable.

NAMES OF PARTIES TO A JOINT RESEARCH AGREEMENT

Not applicable.

REFERENCE TO AN APPENDIX SUBMITTED ON COMPACT DISC

Not applicable.

BACKGROUND OF THE INVENTION 1. Field of the Invention

The present invention relates generally to a tool for grinding or polishing, and more particularly to an abrasive wheel which can be provided with a piece of sandpaper.

2. Description of Related Art Including Information Disclosed Under 37 CFR 1.97 And 37 CFR 1.98

The known abrasive wheel has a drum-shaped main body with a circular outer surface. The outer surface surrounds the axis of the main body. A slot is formed axially in the outer surface. A piece of sandpaper is stretched tight and adheres to the outer surface. Both ends of the sandpaper are inserted in the slot respectively. When the abrasive wheel is rotating, the sandpaper can grind or polish a workpiece. The main body can be provided with a piece of sandpaper of the corresponding specification according to different machining requirements.

When the sandpaper processes the workpiece, relative friction is formed between the sandpaper and the workpiece, and the sandpaper extends and deforms gradually, so that the tension of the sandpaper decreases gradually and the reliability of processing is influenced. On the other hand, it is difficult to stretch the sandpaper tight, and the convenience of changing the sandpaper is influenced.

BRIEF SUMMARY OF THE INVENTION

The primary objective of the present invention is to provide an abrasive wheel which can be provided with a piece of sandpaper. It is a novel abrasive wheel which is easy to be provided with a piece of sandpaper.

Based on the aforementioned objective, the technical characteristic of problem solving of the present invention is that the abrasive wheel which can be provided with a piece of sandpaper comprises: a columnar main body with a mounting end and a driven end. The mounting end is opposite to the driven end in the axial direction of the main body. A first surface is formed on the circumference of the main body. The first surface is located between the mounting end and the driven end, so that a piece of sandpaper is arranged on the first surface. A first storage chamber and a second storage chamber are formed inside the main body. The first storage chamber and the second storage chamber extend into the main body from the mounting end respectively. The first surface forms a channel, one end of the channel extends at the mounting end, the other end of the channel points at the driven end. The channel extends into the main body, and the channel communicates with the first storage chamber. The second storage chamber extends on one side of the channel, so that one end of the sandpaper enters the first storage chamber to form a restricted part. The other end of the sandpaper is located in the second storage chamber. The first storage chamber has a compass circumferential wall.

The abrasive wheel further comprises a tension member disposed in the first storage chamber, and which can rotate in the first storage chamber. The tension member has a guide slot, the guide slot extends from the periphery of the tension member into the tension member, so that the restricted part enters the guide slot through the channel, and the restricted part is guided to adhere to the circumferential wall as the tension member rotates, and then the tension member and the circumferential wall oppositely press and localize the restricted part, and the sandpaper is stretched tight and adhering to the first surface.

The main effect and advantage of the present invention are easy installation of the sandpaper.

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS

FIG. 1 is the stereogram of Embodiment 1 of the present invention.

FIG. 2 is the three-dimensional exploded diagram of Embodiment 1 of the present invention.

FIG. 3 is the axial section view of Embodiment 1 of the present invention.

FIG. 4 is the three-dimensional diagram of main body and mounting sandpaper by tension member in Embodiment 1 of the present invention.

FIG. 5 is the front view of sandpaper mounting state in FIG. 4.

FIG. 6 is the front view of main body and positioning sandpaper by tension member in Embodiment 1 of the present invention.

FIG. 7 is the drawing of partial enlargement of FIG. 6.

FIG. 8 is the front view of sandpaper removing operation in Embodiment 1 of the present invention.

FIG. 9 is the drawing of partial enlargement of FIG. 8.

FIG. 10 is the front view of main body and clamping piece in Embodiment 2 of the present invention, presenting the state of sandpaper removing operation.

DETAILED DESCRIPTION OF THE INVENTION

The embodiments of the abrasive wheel which can be provided with a piece of sandpaper of the present invention are for illustration only, the patent application is not limited to this structure.

As shown in FIG. 1 to FIG. 9, Embodiment 1 of the abrasive wheel which can be provided with a piece of sandpaper includes a columnar main body 10 and a tension member 20, wherein the main body 10 has a mounting end 11 and a driven end 12, the mounting end 11 is opposite to the driven end 12 in the axial direction of the main body 10. The driven end 12 can directly or indirectly bear the power-driven source, so that a rotary driving device (not shown in the figure) actuates the main body 10 to rotate round the central axis X through the mounting end 11 and the driven end 12 as center.

A first surface 13 is formed on the periphery of the main body 10. The first surface 13 is located between the mounting end 11 and the driven end 12, and the first surface 13 in approximately circular arc is preferred implementation, so that a piece of sandpaper 90 is arranged on the first surface 13. When the first surface 13 is a circular surface, the center of circle of the first surface 13 is on the central axis X. A first storage chamber 14 and a second storage chamber 15 are formed inside the main body 10. The first storage chamber 14 and the second storage chamber 15 extend from the mounting end 11 into the main body 10 respectively. A channel 16 is formed on the first surface 13. One end of the channel 16 extends at the mounting end 11, the other end of the channel 16 points at the driven end 12. The channel 16 extends into the main body 10, and the channel 16 communicates with the first storage chamber 14, the second storage chamber 15 extends on one side of the channel 16, so that one end of the sandpaper 90 enters the first storage chamber 14 to form a restricted part 92, the other end of the sandpaper 90 is located in the second storage chamber 15. The first storage chamber 14 has a compass circumferential wall 142.

The tension member 20 is disposed in the first storage chamber 14, and can rotate in the first storage chamber 14. The tension member 20 has a guide slot 21, the guide slot 21 extends from the periphery of the tension member 20 into the tension member 20, so that the restricted part 92 enters the guide slot 21 through the channel 16, and the restricted part 92 is guided to adhere to the circumferential wall 142 as the tension member 20 rotates, and then the tension member 20 and the circumferential wall 142 oppositely press and localize the restricted part 92, and the sandpaper 90 is stretched tight and adhering to the first surface 13.

As shown in FIG. 4 and FIG. 5, when the sandpaper 90 is arranged in Embodiment 1, the sandpaper 90 is opposite to the first surface 13, and multiple grinding parts 96 formed of abrasive particles are laid on the sandpaper 90, facing one side of the sandpaper 90 far from the first surface 13. When the guide slot 21 is connected to the channel 16, one end of the sandpaper 90 is wound to form a winding part 94, the winding part 94 is placed in the second storage chamber 15 through the mounting end 11, so that the winding part 94 is located in the second storage chamber 15. The other end of the sandpaper 90 is placed in the guide slot 21 to form the restricted part 92. The portions of the sandpaper 90 near the winding end 94 and the restricted part 92 enter the channel 16 respectively. Afterwards, as shown in FIG. 6 and FIG. 7, the tension member 20 is rotate counterclockwise as shown in FIG. 6, the tension member 20 has a first slot wall 212 and a second slot wall 214. The first slot wall 212 and the second slot wall 214 are located on both sides of the guide slot 21 respectively. The first slot wall 212 laterally pushes the restricted part 92, so that the restricted part 92 adheres to the circumferential wall 142, and the tension member 20 and the circumferential wall 142 press the restricted part 92 oppositely. As the tension member 20 rotates, the restricted part 92 is actuated away from the channel 16 along the circumferential wall 142 gradually under the frictional traction of the tension member 20, so that the sandpaper 90 is stretched tight and adhering to the first surface 13. The arrangement of the sandpaper 90 is completed, it is easy to mount the sandpaper 90.

As shown in FIG. 4 to FIG. 6, the winding part 94 is located in the second storage chamber 15, that is a feasible demonstration of locating one end of the sandpaper 90 in the second storage chamber 15, and one end of the sandpaper 90 can be located in the second storage chamber 15 the second storage chamber 15 in other forms.

Embodiment 1 with the sandpaper 90 can be arranged in the rotary driving device, so that the sandpaper 90 performs grinding or polishing operation on a workpiece (not shown in the figure). As the operation proceeds, the sandpaper 90 extends and deforms gradually, and the tension of the sandpaper 90 decreases gradually, the sandpaper 90 is further tightened by rotating the tension member 20, restoring the state of adhering to the first surface 13. After the sandpaper 90 is arranged, the tension member 20 can be rotated according to the state of the sandpaper 90 at any time, so as to restore the tight state of the sandpaper 90. When the abrasive particles of the grinding part 96 wear or drop off gradually, the grinding part 96 cannot perform grinding or polishing operation effectively, the sandpaper 90 can be changed to enhance the operation benefit of the sandpaper 90.

As shown in FIG. 2, FIG. 8 and FIG. 9, the tension member 20 has a pushing part 22, so that the pushing part 22 pushes the restricted part 92 to move towards the channel 16, and then the sandpaper 90 can be removed. Furthermore, the tension member 20 has a second surface 23, the second surface 23 is formed on the periphery of the tension member 20, so that the circumferential wall 142 and the second surface 23 oppositely press and localize the restricted part 92. The pushing part 22 is formed at the conjoiner of the second slot wall 214 and the second surface 23, so that the pushing part 22 pushes the restricted part 92 to move towards the channel 16.

To remove the sandpaper 90 from Embodiment 1, the tension member 20 is rotated clockwise as shown in FIG. 8, when the guide slot 21 is opposite to the tail end of the restricted part 92, the suppression of the tension member 20 on the tail end of the restricted part 92 is cancelled. As the tension member 20 rotates continuously, the pushing part 22 can push the restricted part 92 towards the channel 16, and the tight state of the sandpaper 90 adhering to the first surface 13 is cancelled. When the guide slot 21 communicates with the channel 16, the restricted part 92 and the winding part 94 can be removed from the main body 10 through the mounting end 11. The removal of the sandpaper 90 is completed, it is convenient to change the sandpaper 90.

As shown in FIG. 1 to FIG. 3, the main body 10 can be provided with a baffle 30 as required. The tension member 20 is located between the baffle 30 and the driven end 12, the baffle 30 stops the tension member 20, so as to localize the tension member 20 on the main body 10. Furthermore, with the arrangement of the baffle 30, the mounting end 11 can form a compass flange 112 in axial direction. The flange 112 is disposed on the periphery of the baffle 30, hereby, the baffle 30 is embedded in the flange 112 for localizing the baffle 30.

Embodiment 1 can include a shaft lever 40 and a bolt 50, wherein the shaft lever 40 axially contacts the driven end 12, so that the shaft lever 40 is configured on the rotary driving device, the rotary driving device can pull the main body 10 to rotate. The bolt 50 axially penetrates the baffle 30 and the tension member 20 is screwed on the shaft lever 40, so as to localize the baffle 30. The bolt 50 has a cap 52, the bolt 50 axially penetrates a washer 60, the washer 60 is sandwiched in between the cap 52 and the baffle 30.

The baffle 30 penetrates a first punch hole 32 coordinating with the bolt 50, the tension member 20 penetrates a second punch hole 24 coordinating with the bolt 50. The bolt 50 axially penetrates the first punch hole 32 and the second punch hole 24 is screwed on the shaft lever 40, hereby, the first punch hole 32, the second punch hole 24 and the bolt 50 can be adapted in radial dimension, and the first punch hole 32, the second punch hole 24, the shaft lever 40 and the bolt 50 are coaxially arranged along the central axis X. Thus, when the bolt 50 axially penetrates the baffle 30 and the tension member 20 is screwed on the shaft lever 40, the tension member 20 centers inside the first storage chamber 14, so as to further enhance the reliability of the tension member 20 clamping the restricted part 92 with the circumferential wall 142.

The driven end 12 forms a joint holder 122 in axial direction, the joint holder 122 forms a polygonal embedding groove 124 in axial direction. The shaft lever 40 is provided with an insert 42 fitting the embedding groove 124. The insert 42 is embedded in the embedding groove 124, so that the shaft lever 40 is axially connected to the driven end 12. The relation between the shaft lever 40 and the driven end 12 can be replaced by integration of the shaft lever 40 and the driven end 12 or connection in other forms.

The tension member 20 forms an operation hole 25 in axial direction, so that a hand tool (not shown in the figure) is embedded in the operation hole 25 to pull the tension member 20 to rotate, so as to enhance the convenience of operating the tension member 20 to rotate. The quantity and shape of the operation hole 25 and the positioning of the operation hole 25 can be changed as required. The figures only show a feasible demonstration, not to limit the technical means disclosed in Embodiment 1.

As shown in FIG. 10, the major difference of Embodiment 2 from Embodiment 1 is that the tension member 20 is provided with a slot 26, the slot 26 extends from the periphery of the tension member 20 into the tension member 20, the tension member forms a third slot wall 262 on one side of the slot 26, the periphery of the tension member 20 forms the second surface 23 and a third surface 27 between the guide slot 21 and the slot 26, so that the circumferential wall 142 and the second surface 23 oppositely press and localize the restricted part 92. The pushing part 22 is formed at the conjoiner of the third slot wall 262 and the third surface 27.

To remove the sandpaper 90 from Embodiment 2, the tension member 20 is rotated clockwise as shown in FIG. 10. When the slot 26 is opposite to the tail end of the restricted part 92, the suppression of the tension member 20 on the tail end of the restricted part 92 is cancelled. As the tension member 20 rotates continuously, the pushing part 22 can push the restricted part 92 towards the channel 16, so as to remove the sandpaper 90. 

I claim:
 1. An abrasive wheel which can be provided with a piece of sandpaper, including: a columnar main body, the main body has a mounting end and a driven end; the mounting end is opposite to the driven end in the axial direction of the main body; a first surface is formed on the circumference of the main body; the first surface is located between the mounting end and the driven end, so that a piece of sandpaper is arranged on the first surface; a first storage chamber and a second storage chamber are formed inside the main body; the first storage chamber and the second storage chamber extend into the main body from the mounting end respectively; the first surface forms a channel, one end of the channel extends at the mounting end, the other end of the channel points at the driven end; the channel extends into the main body, and the channel communicates with the first storage chamber; the second storage chamber extends on one side of the channel, so that one end of the sandpaper enters the first storage chamber to form a restricted part; the other end of the sandpaper is located in the second storage chamber; the first storage chamber has a compass circumferential wall; and a tension member, the tension member is disposed in the first storage chamber, and can rotate in the first storage chamber; the tension member has a guide slot, the guide slot extends from the periphery of the tension member into the tension member, so that the restricted part enters the guide slot through the channel, and the restricted part is guided to adhere to the circumferential wall as the tension member rotates, and then the tension member and the circumferential wall oppositely press and localize the restricted part, and the sandpaper is stretched tight and adhering to the first surface.
 2. The abrasive wheel which can be provided with a piece of sandpaper defined in claim 1, wherein the tension member has a pushing part, so that the pushing part pushes the restricted part to move towards the channel, and then the sandpaper can be removed.
 3. The abrasive wheel which can be provided with a piece of sandpaper defined in claim 2, wherein the tension member has a second surface, the second surface is formed on the periphery of the tension member, so that the circumferential wall and the second surface oppositely press and localize the restricted part; the tension member forms a second slot wall on one side of the guide slot; the pushing part is formed at the conjoiner of the second slot wall and the second surface.
 4. The abrasive wheel which can be provided with a piece of sandpaper defined in claim 2, wherein the tension member is provided with a slot, the slot extends from the periphery of the tension member into the tension member; the periphery of the tension member forms a second surface and a third surface between the guide slot and the slot, so that the circumferential wall and the second surface oppositely press and localize the restricted part; the tension member forms a third slot wall on one side of the slot; the pushing part is formed at the conjoiner of the third slot wall and the third surface.
 5. The abrasive wheel which can be provided with a piece of sandpaper defined in claim 1, wherein the main body is provided with a baffle, the tension member is located between the baffle and the driven end; the baffle stops the tension member, so as to localize the tension member on the main body.
 6. The abrasive wheel which can be provided with a piece of sandpaper defined in claim 5, wherein the mounting end forms a compass flange in axial direction, the flange is disposed on the periphery of the baffle, so as to localize the baffle.
 7. The abrasive wheel which can be provided with a piece of sandpaper defined in claim 5, including a shaft lever and a bolt, wherein the shaft lever axially contacts the driven end, so that the shaft lever is configured on a rotary driving device; the bolt axially penetrates the baffle and the tension member is screwed on the shaft lever, so as to localize the baffle.
 8. The abrasive wheel which can be provided with a piece of sandpaper defined in claim 7, wherein the driven end forms a joint holder in axial direction, the joint holder forms a polygonal embedding groove in axial direction; the shaft lever is provided with an insert fitting the embedding groove; the insert is embedded in the embedding groove, so that the shaft lever axially contacts the driven end.
 9. The abrasive wheel which can be provided with a piece of sandpaper defined in claim 1, wherein the tension member forms an operation hole in axial direction, so that a hand tool can be embedded in the operation hole to pull the tension member to rotate.
 10. The abrasive wheel which can be provided with a piece of sandpaper defined in claim 1, wherein the first surface is approximately in the shape of circular arc. 